Underframe for railway-cars.



NITED STATES PATENT OFFICE.

HERBERT R. KEITHLEY, OF BUFFALO, NEW YORK.

UNDERFRAME RAILWAY-CARS.

SPECIFICATION forming part of Letters Patent No. 659,402, dated. October9, 1900. Application filed August 1, 1900. Serial No. 25,520. (Nomodel.)

To all whmn it Wwty concern:

Be it known that I, HERBERT R. KEITHLEY, a citizen of the United States,residing at Buf-- fa'lo, in the county of Erie and State of New York,have invented newand useful Improvements-in Underframes forRailway-Oars, of which the following is a specification.

The object of my invention is to provide a steel underframe forrailway-cars which is comparatively light and which at the same timepossesses the necessary strength and rigidity to withstand the severeshocks to which cars are subjected.

In the accompanying drawings, Figure 1 is a fragmentary side elevationof my improved under-frame. Fig. 2 is a transverse section in line 2 2,Fig. 1. Fig. 3 is a detached side elevation of the center sill.

Like letters of reference refer to like parts in the several figures.

A A are the side sills ofthe underframe. These sills are composed oflongitudinal Z- bars, with their upper flanges preferably facinginwardly and each Z-bar constructed of a single plate of pressed steel.If desired, the Z-bars of each side sill may be rigidly tied together byhorizontal top and bottom plates a a, which are riveted to the flangesof the Z bars, forming practically a boxgirder. The middle portion a ofeach side sill is made of greater depth than its end por-- tions toprovide the necessary strength in that portion of the underframe, andthe sill gradually increases in depth from its end portions toward itsdeepened middle portion,as shown in Fig. 1. e a

B is the center sill, which is constructed, substantially, like the sidesills, the same comprising two longitudinal Z-bars, each constructed ofa single plate of pressed steel, and, if desired, the two bars may beconnected together by upper and lower plates 1) b, which are riveted tothe flanges of the bars and which form a box-girder with the Z-bars. Inthe construction shown in the drawings the Z-bars of the center sill areplaced so that their upper flanges face outwardly; but, if desired, theymay be arranged to face inwardly like the upper Z-bar flanges of theside sills. As shown in Fig. 3, the middle. portion 19 of the centersill is made deeper than its end portions, similar to the side sills. Ifdesired, the upper flanges of the Z-bars of which extend across theupper and lower' sides of said sills, and a horizontal channelbarf,which embraces said Z-bars. The peculiar construction of this endconnection of the sills and the particular construction of the bolsterherein shown form no part of my present invention, but are described andclaimed in another application for patent filed by me April 24, 1900,Serial No. 14,093, series of 1900.

I claim as my invention- 1. An underframe for a railway-car having aside sill composed of Z-bars, each Z-bar constructed of a single plateof pressed steel and having its middle portion made of greater depththan its end portions, and top and bottom plates riveted to the flangesof said Z- bars and forming a box-girder therewith, substantially as setforth.

2. An underframe for a railway-car having a center sill composed ofZ-bars, each Z-bar constructed of a single plate of pressed steel andhaving its middle portion made of greater depth than its end portions,and top and bottom plates riveted to the flanges of said 2- bars andforming a box-girder therewith, substantially as set forth.

3. An underframe for a railway-car having side and center sills, eachcomposed of a pair of Z-bars and top and bottom plates riveted to theflanges of said bars to form a box-girder, each of saidZ-bars beingconstructed of a single plate of pressed steel and having its middleportion made of greater depth than its end portions, substantially asset forth.

Witness my hand this 30th day of Ju1y,1900.

HERBERT R. KEITHLEY.

' Witnesses:

GEO. M. SEAMAN, W. A. SITZLER.

